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Mi Air Purifier 3H

380 m³/h PM CADR
More effective and more powerful

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  • 380 m³/h PM CADR

    Delivers 6330 liters of purified air per minute*

  • High Efficiency Filter

    Effectively filters particles as small as 0.3 microns

  • High-precision laser PM sensor

    Sensitively detects even slight pollution

  • OLED touch screen display

    Clean air at your fingertips

  • APP+AI smart voice control*

    Control remotely so you come home to fresh air

  • A4 paper sized footprint*

    Compact, quiet, non-intrusive

Is the air you breathe actually clean?
The continuous release of formaldehyde from furniture,
harmful gases, foul odors, bacteria, viruses, pollen,
pet dander and other allergens suspended in the air,
are endangering your family's respiratory health.

The hidden air hazards surrounding your home
require a fully effective 360° solution

Bacteria and virtual
suspended in air

The unpleasant smell
of kitchen smoke

Pollen allergens

toluene and other harmful
gass from furniture

Pollution from Outside

A Classic Upgrade to Launch a New Classic

Since the first Xiaomi air purifier was unveiled in 2014, we've never stopped chasing superior performance.
This latest challenge was to improve performance while preserving the purifier’s classic appearance.
Our engineers redesigned the entire air duct system to increase the air purifier’s PM CADR by 22%* to 380 m³/h.

380 m³/h PM CADR
Mi Air Purifier 3H
Mi Air Purifier 2S
22% PM CADR increase
45 ㎡ Effective room size*
8 ㎡ Effective room size increase*

Integrated 360° cylindrical High Efficiency Filter

The three-layer filter effectively removes PM2.5, formaldehyde and other harmful substances

The first layers removes hair,dust,cotton
fibers and other large particles


Dust and
condensed fumes


Paper,wood and
other tiny


Paint filers
such as pollen
and cotton


Human hair
and petful

The second layer consists of a premium High Efficiency Filter that effectively eliminates 99.97% of bacteria, viruses, cigarette smoke, PM2.5, pollen, dust, pet dander, and other allergens as small as 0.3 microns from the air.
It is also effective towards finer particles of 0.1 microns.


Pet Dander




Cigarette Smoke



The third layer is an active carbon filter
that absorbs formaldehyde,
volatile organic compounds
(VOCs) and other harmful gases.




New powerful air duct system
Delivers 6330 liters of purified air per minute*

To increase the air output without changing the size of the air purifier, we had to carefully redesign every part of its air duct system.
We developed a rear-tilting centrifugal fan that can move air more powerfully and custom-made a new direct-current brushless motor.
The newly designed pressurized air duct and the air grille form an even more efficient airflow path, considerably boosting the purifier's performance.

  • Rear-tilting centrifugal fan + Customized brushless motor
    A powerful combination that outputs massive amounts of air

  • Pressurized air duct
    Polished inner wall for lower air resistance

  • Large air outlet grille
    Fast, even airflow

OLED touch screen display
Air quality at a glance, easy to use even at night

Simply tap the keys on the OLED display to work the purifier, and the reported info is viewable at a glance.
Room air quality data, the purifier’s operational status, etc., are all displayed clearly.
The tri-colored light ring quickly tells you the quality of the air in the room.

  • Favorite mode
  • Sleep mode
  • Auto mode
  • Low
  • Medium
  • High
  • PM2.5 < 75 μg/m³
    Light ring is green
  • 75 < PM2.5 < 150 μg/m³
    Light ring is orange
  • PM2.5 > 150 μg/m³
    Light ring is red

High-precision laser PM sensor
Sensitively detects even slight pollution

The Mi Air Purifier 3H comes with a high-precision laser PM sensor that detects microscopic particulates and reports changes in room air quality in real time.
In auto mode, the purifier adjusts proactively for better cleaning.

APP+AI smart voice control*
Smart control,linking multiple smart products

With the Mi Home app, you can use your phone to keep track of your home’s air quality at all times.
You can also control the air purifier remotely and set turn-on and turn-off times.
You can use the Favorite mode for highly efficient cleaning specifically geared for your space.
Supports Google Assistant so you can use smart AI voice control.

Hey Google, turn on the air purifier
Hey Google, turn off the air purifier
Mi Home: Turn on the air purifier if PM2.5 > 75μg
Mi Home: Turn off the air purifier if window is opened

A4 paper sized footprint
Space saving and natural feeling

Classic, super-simple design. Compact, with a footprint smaller than a sheet of A4 paper.
Fits nicely next to your sofa or under a window sill to become a natural part of your home.

Quiet and energy saving
Keep the air purifier on 24 hours a day for good air quality

Even with its upgraded performance, the Mi Air Purifier 3H is still quiet. In sleep mode, the noise level is as low as 32dB(A)*.
The high-efficiency direct-current brushless motor draws only 38 W of power.
When running 24 hours a day, it uses up to 1 kWh of power each day, even less than an energy-saving light bulb.


Noise as low as

Compatible with many types of Mi air purifier filters

  • Mi Air Purifier Filter Anti-formaldehyde S1
  • Mi Air Purifier Filter Antibacterial
  • Mi Air Purifier High Efficiency Filter